Efecto de la radiación UV en arcillas expansivas tratadas con aceite sulfonado

Tauta, Javier F. Camacho; Ortíz, Oscar Javier Reyes; Mayorga, Catalina Bejarano

doi:10.25100/iyc.v12i2.2692

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…Eighteen samples of old adobe and eighteen samples of new adobe were subjected to accelerated weathering by mean of repeated stages of radiation and condensation: a cycle of six hours at controlled irradiance (1.60 W/m 2 ) and temperature (45°C) followed by a condensation cycle (100 % relative humidity) of two hours long. This cyclic exposition to UV radiation followed by moisture is a variation to that used by [36]. The difference consisted in that the duration of each period was reduced given the effect of long condensation cycles on the consistency (checked by mean of a pocket penetrometer) of preliminary samples tested prior the final experimental program.…”

Section: Methodsmentioning

confidence: 99%

Mechanical Deterioration by Weathering of the Adobe from the Tausa Chapel (Colombia)

Camacho-Tauta,

Uribe-Kaffure,

Ramos-Cañón

2023

TecnoL.

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There is a significant number of structures in the world built with earth materials that deteriorate over time. Typically, this deterioration is neither quantified nor used as input for safety analysis of ancient infrastructure. The aim of this work is to propose a novel way to consider the influence of the weathering on the mechanical properties of adobe units. To achieve this objective, adobe samples recovered from a deteriorated sector (old adobe) of a colonial-style chapel built in adobe (Tausa, Colombia) and similar materials from a local soil deposit as a source for restoration of the chapel (new adobe) were studied. Samples using the new adobe were prepared by compaction under controlled moisture. Half of the samples of new adobe were exposed to ambient conditions while the other half and old adobe samples were subjected to accelerated ambient conditions by using a weathering machine (controlling UV radiation, temperature, and moisture). Samples were tested at different periods by unconfined and triaxial compression tests. Results show that old adobe is not sensitive to weathering while new adobe exhibit variations in strength and stiffness. It was observed that these properties in new adobe initially increase with exposure to weathering until reaching twice than those obtained in old adobe samples but tend to reduce with longer periods of exposure. Therefore, deterioration factors of up to two are proposed for vulnerability and safety analysis of new constructions in these materials. Deterioration factors are proposed to be used as a first approximation to quantify the climatic effect over the mechanical response of the adobe.

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Section: Methodsmentioning

confidence: 99%

Mechanical Deterioration by Weathering of the Adobe from the Tausa Chapel (Colombia)

Camacho-Tauta,

Uribe-Kaffure,

Ramos-Cañón

2023

TecnoL.

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“…The main effects of sulphonated oil on clay-clad soils are a reduction in interstitial spaces, reduction in permeability, increase in sedimentation, improvement of the response to compaction, and increase in the soil density. The studies carried out with sulphonated oils and the evidence obtained through field tests showed that the electrochemical stabilisation system is a competitive alternative to reduce the expansive potential of clay soils [36].…”

Section: Stabilising Materialsmentioning

confidence: 99%

Stabilising Rural Roads with Waste Streams in Colombia as an Environmental Strategy Based on a Life Cycle Assessment Methodology

et al. 2021

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Roads with low traffic volume link rural settlements together and connect them with urban centres, mobilising goods and agricultural products, and facilitating the transportation of people. In Colombia, most of these roads are in poor conditions, causing social, economic, and environmental problems, and significantly affecting the mobility, security, and economic progress of the country and its inhabitants. Therefore, it is essential to implement strategies to improve such roads, keeping in mind technical, economic, and environmental criteria. This article shows the results of the application of the environmental life cycle assessment—LCA—to sections of two low-traffic roads located in two different sites in Colombia: one in the Urrao area (Antioquia), located in the centre of the country; and another in La Paz (Cesar), located in the northeast of the country. Each segment was stabilised with alternative materials such as brick dust, fly ash, sulfonated oil, and polymer. The analysis was carried out in three stages: the first was the manufacture of the stabiliser; the second included preliminary actions that ranged from the search for the material to its placement on site; and the third was the stabilisation process, which included the entire application process, from the stabiliser to the road. The environmental impacts are mainly found in the manufacture of stabilisers (60% of the total), for sulfonated oil or polymer, due to the different compounds used during production, before their use as stabilisers. The impact categories with the greatest influence were abiotic depletion potential (ADP), global warming potential (GWP) and terrestrial ecotoxicity potential (TETP). For the stabilisation stage (impact between 40% and 99%), ash and brick dust have the highest impacts. The impact categories most influenced in this stage were: acidification potential (AP), freshwater aquatic ecotoxicity potential (FAETP), human toxicity potential (HTP), marine aquatic ecotoxicity potential (MAETP) and photochemical ozone creation potential (POCP).

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Efecto de la radiación UV en arcillas expansivas tratadas con aceite sulfonado

Cited by 2 publications

References 5 publications

Mechanical Deterioration by Weathering of the Adobe from the Tausa Chapel (Colombia)

Mechanical Deterioration by Weathering of the Adobe from the Tausa Chapel (Colombia)

Stabilising Rural Roads with Waste Streams in Colombia as an Environmental Strategy Based on a Life Cycle Assessment Methodology

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